Clean It Up
UK Window Cleaning Forum => Window Cleaning Forum => Topic started by: mjm on April 13, 2018, 08:48:13 pm
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so i have a 40/40 hf5 with pump i have had it for around 2 months i have questions for people
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Well ask them then , we aren’t mind readers :D
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yeh sorry just wanted to get someones attention ok
my tds is 370 reading from the membrane unpumped after leaving idle for 2 days and flushing for 15 mins 28 33 then 08 when pumped is yours the same
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Your tds will be higher to start with when you turn your tap on regardless of being sat idle I think 🤔, then running it for a while until the tds goes as low as it goes then plug into DI is how it works. My tds is 270 , I run it for 5 mins or so whilst I’m unplugging the battery charger etc then it goes down to 002
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great so how big is your di canister i got a 6ltre at the moment and iam getting roughly 8000 ltres from it i am using 1000ltres a week is yours roughly the same i know your tds is different but whatever
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Just to throw a curve ball.
My tap water is just less than 300 (cant remember exactly how much) but it comes out my RO at 006 and i just fill up my ibc tank and dont use DI
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I have 2 11ltr vessels , so it last me a while . I used to have a 1ltr vessel with a 450gpd and was forever changing it so i just bought 2 bigger ones & a 4040 so I don’t have to faff about as often
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shrek thats exactly what i had 450 a day pumped and thats excactly why i upgraded to this ro
however my pressure gauge is at the top of the ro my tap pressure is 40psi its 50ft from the machine so unpumped the pressure gauge is 20 psi and pumped is 100psi but i am turning the pump to 140psi fatster water fill should i just run it at 100psi because the paper work says optimum speed 100psi will i brake the membranes if its over 100 psi
nathen is your system pumped
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I’m not an expert in this field lol , mine is unpumped , hf5 , tap pressure of 55psi. I run mine at 40psi and get around 2ltrs a minute. I’m fine with that and wouldn’t benefit from it producing any faster.
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thanks shrek
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so whats your reading from you membrane the lowest you can get
there must be a few of you i need a few reading
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I have quite high tap pressure. I had a HF5 lasted a year tops before it was replaced with a HF4, much better production rate, been fitted two years and TDS output still very good. Don't use a pump for 4040 as not needed.
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whats your membrane reading windowswashed lowest you can get unpumped
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My RO (HF4) is reading 0.0 still I have production rate at 30% output and 70% waste.
Previous RO (HF5) I use to run at 60 production & 40 waste but I'm pretty sure not changing the pre filters regularly killed it off prematurely.
I have a 2000litre & 1000litre tank both plumbed together for production storage so I can leave it on 24/7 when it's nearly depleted. When storage is full it's enough for the week. Where I live roadworks were constantly going on owing to 40 tonne juggernauts damaging the road where main water pipes were forever being dug up and couldn't rely on production on a daily basis hence why I bought two big storage tanks.
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ok thanks windowswashed
the reason iam asking these questions is when the beast from the east blew inn i had a burgalry at the garage the door got left open and for 2 days my machine was frozen i managed to save the pump and changed the di but i think the membrane has been damaged judging by the 3 reading i have now of you guys .
iam still getting 08 pumped from the membrane but i know know i am going to have to change it not yet but in a month or so
so how do i definately tell if its gone as i only ever have had a 450gpd system and i would change the membranes at 30 pumped but with this being a bigger scale i dont know how to tell if its time to change i definately cant get it lower than 30 unpumped
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ok thanks windowswashed
the reason iam asking these questions is when the beast from the east blew inn i had a burgalry at the garage the door got left open and for 2 days my machine was frozen i managed to save the pump and changed the di but i think the membrane has been damaged judging by the 3 reading i have now of you guys .
iam still getting 08 pumped from the membrane but i know know i am going to have to change it not yet but in a month or so
so how do i definately tell if its gone as i only ever have had a 450gpd system and i would change the membranes at 30 pumped but with this being a bigger scale i dont know how to tell if its time to change i definately cant get it lower than 30 unpumped
When everything freezes the first thing that normally gets damaged if not protected from severe cold temp is the pre filter casing . If your RO membrane was knackered it probably wouldn't produce any water and it would be leaking around the connections really badly. If unsure, disconnect the connections and visually check the condition of the membrane. If it's working fine and TDS hasn't moved a great deal then it should be fine (membrane).
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Thanks there's no leaking so Iam just going to change the prefilters when this resin runs out in 4 to 5 weeks and put a 25ltr di on it should last 13 months with the calculations I have
Thank you for your advice all
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Are you saying you’re getting 08ppm after your membrane or DI?
If it’s after your membrane then I’m struggling to see whats wrong with that? Especially if that’s unpumped (for the recored, stick with 80-100psi, if you’re pumping at that pressure anyway then go for a HF4)
If that’s after your DI then you can make a judgement until you unplug your DI, check your TDS after your membrane.
As has been mentioned previously, give it a few mins for it to settle down as all the crap will push through first.
You should be aiming for a minimum of 95% production rate, which in your case is (if your TDs is 370 from tap) 18/19. Any higher and your membrane is on its way out.
(This is after your membrane though, not DI!)
If your getting less than 18/19, I’m not sure what the problem is (because there isn’t one); just change your resin.
(For the record, what TDS your getting unpumped is irrelevant...you have a pump, why wouldn’t you use it..?)
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No readings from membrane unpumped...... is 026 pumped is 008
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so reading back these posts my membrane may have a bit of damage but is ok anyway but will just need replacing earlier i have a fresh fill of di in the 6ltre container and have a spare 6 ltre to go iam moving from this property because were on a metre thats one of the reasons i got a pump fitted i will upgrade to a hf4 membrane when the membrane is shot thanks again for the advice